They combine saxophones and sousaphones, accordions and electric violins. Part Ethiopian pop and jazz, part American funk, part Eastern European brass ensemble, Debo Band is about as eclectic as musical fusion groups get. Well, now even more eclectic. On their new CD, “Ere Gobez,” the group adds yet another musical genre to their repertoire: folk music from Okinawa. And the high-energy tunes will really get you grooving. The Boston-based group has its deepest roots in Ethiopian music. Those are still strong in the band’s second album, but this time the…